Author: Albert Silver
Date: 13:53:26 03/20/02
Go up one level in this thread
On March 20, 2002 at 16:39:26, Aaron Tay wrote:
>On March 20, 2002 at 16:13:45, Albert Silver wrote:
>
>>On March 20, 2002 at 15:13:58, Gian-Carlo Pascutto wrote:
>>
>>>In the Dutch championship 2001, my program reached the following
>>>position with black against Rebel Century
>>>
>>>[D]r2q1rk1/pbp1bppp/1p2pn2/8/3P1B2/2PB1N2/PP2QPPP/R4RK1 b - - 0 1
>>>
>>>It played the losing move a5?, and proceeded with the 'plan' of
>>>pushing it further along the a-file.
>>>
>>>Nowadays, it would find the correct c5 after about a minute
>>>of search, but it is clear by looking at the variations that
>>>it is more due to luck and that it is still not really understanding
>>>what is going on.
>>>
>>>I am wondering if one of the strong players is able to explain
>>>why c5 is good and a5 is not. I would play c5 myself, but I
>>>have to admit I would not be able to explain why it is better
>>>either. I just know it is good to hit at the d4 pawn with the
>>>c pawn if possible, but I suspect there is more to it?
>>
>>The two points that I believe to be decisive are:
>>
>>- It attacks and pressures the center (never lost sight of the battle for the
>>center)
>>- Allows play and pressure on both the c and d files.
>>- Once white's c-pawn is gone the d5 square is pretty nice.
>>
>>As to a5, the problem is that it doesn't really do anything. Push-push-push and
>>what do you get? c3 as a target? Not even that.
>
>Maybe it's trying to open the a file..
It can't. The white pawns are on a2 and b2 so when a3 comes around, b3 ends the
dream. In the meantime, white gets 3 free tempi to do whatever it likes.
Albert
>Bonuses for rook on open file and all that
>One ametuer Chess engine i used to try, always played like this when out
>of book. I took a look at it's position parimeters (which were in a text file)
>there are a +2 or something (i can't remember exactly) bonus for rooks on open
>files..
>
>
>Aaron
>> Albert
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